Transfer of propeerty?

i sold my property to CP2.ORG.LLC my house was in forclosure and i was told that it was an umable note. now i get a letter from the original lender saying that it was not umable, and that they want me to buy the house back or pay off thr mortgage. they umed the note the house belongs to them not me i dont want the house. we went to plantium land title in fort myers